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  express-ws实现webSocket通信
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  <h5 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h5><p>最近要给自己写的项目中加一个客服聊天的功能。就是前端商城和后台管理系统通信。但是是两个不同的端口。</p>
<p>百度了一下就找到了webSocket。</p>
<h5 id="什么是webSocket？"><a href="#什么是webSocket？" class="headerlink" title="什么是webSocket？"></a>什么是webSocket？</h5><p>WebSocket 是 HTML5 开始提供的一种在单个 TCP 连接上进行全双工通讯的协议。</p>
<p>WebSocket 使得客户端和服务器之间的数据交换变得更加简单，允许服务端主动向客户端推送数据。在 WebSocket API 中，浏览器和服务器只需要完成一次握手，两者之间就直接可以创建持久性的连接，并进行双向数据传输。</p>
<p>在 WebSocket API 中，浏览器和服务器只需要做一个握手的动作，然后，浏览器和服务器之间就形成了一条快速通道。两者之间就直接可以数据互相传送。(来自菜鸟教程：<a target="_blank" rel="noopener" href="https://www.runoob.com/html/html5-websocket.html">https://www.runoob.com/html/html5-websocket.html</a>)</p>
<h5 id="express-ws实现"><a href="#express-ws实现" class="headerlink" title="express-ws实现"></a>express-ws实现</h5><p>1、首先在express项目中安装express-ws</p>
<p><code>npm i express-ws --save</code></p>
<p>2、然后引入</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">const</span> express = <span class="built_in">require</span>(<span class="string">&#x27;express&#x27;</span>)</span><br><span class="line"><span class="keyword">const</span> app = express()</span><br><span class="line"><span class="comment">// 引入WebSocket</span></span><br><span class="line"><span class="keyword">const</span> ws = <span class="built_in">require</span>(<span class="string">&quot;express-ws&quot;</span>)</span><br><span class="line"><span class="comment">// 将webSocket服务混入app，相当于为app添加.ws方法</span></span><br><span class="line">ws(app)</span><br></pre></td></tr></table></figure>
<p>3、启动服务</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//为了获取到所以的客户端</span></span><br><span class="line"><span class="keyword">const</span> wss = ws(app).getWss(<span class="string">&#x27;/&#x27;</span>)</span><br><span class="line"><span class="comment">// 建立webSocket服务</span></span><br><span class="line">app.ws(<span class="string">&#x27;/&#x27;</span>, <span class="function">(<span class="params">ws, req</span>) =&gt;</span> &#123;</span><br><span class="line">    <span class="built_in">console</span>.log(<span class="string">&quot;连接成功！&quot;</span>);</span><br><span class="line">    <span class="comment">// send给客户端发消息</span></span><br><span class="line">    <span class="comment">// on是监听事件</span></span><br><span class="line">    <span class="comment">// message表示服务端传来的数据</span></span><br><span class="line">    ws.on(<span class="string">&quot;message&quot;</span>, <span class="function">(<span class="params">msg</span>) =&gt;</span> &#123;</span><br><span class="line">        <span class="comment">// 给所有的客户端广播消息</span></span><br><span class="line">        wss.clients.forEach(<span class="function">(<span class="params">e</span>) =&gt;</span> &#123;</span><br><span class="line">            e.send(msg)</span><br><span class="line">        &#125;)</span><br><span class="line">    &#125;)</span><br><span class="line">    <span class="comment">// close 事件表示客户端断开连接时执行的回调函数</span></span><br><span class="line">  ws.on(<span class="string">&#x27;close&#x27;</span>, <span class="function"><span class="keyword">function</span> (<span class="params">e</span>) </span>&#123;</span><br><span class="line">    <span class="built_in">console</span>.log(<span class="string">&#x27;close connection&#x27;</span>)</span><br><span class="line">  &#125;)</span><br><span class="line">  </span><br><span class="line">&#125;)</span><br><span class="line"></span><br><span class="line">app.listen(<span class="number">3002</span>, <span class="function">() =&gt;</span> &#123;</span><br><span class="line">    <span class="built_in">console</span>.log(<span class="string">&#x27;success in port 3002，服务已经跑起来啦&#x27;</span>);</span><br><span class="line">&#125;)</span><br><span class="line"></span><br></pre></td></tr></table></figure>
<p>此时服务已经在3002端口跑起来了</p>
<h5 id="前端接收消息"><a href="#前端接收消息" class="headerlink" title="前端接收消息"></a>前端接收消息</h5><p>1、vue中</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br></pre></td><td class="code"><pre><span class="line">&lt;script&gt;</span><br><span class="line">    <span class="comment">//连接webSocket</span></span><br><span class="line"><span class="keyword">const</span> ws = <span class="keyword">new</span> WebSocket(<span class="string">&#x27;ws://localhost:3002&#x27;</span>)</span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> &#123;</span><br><span class="line">  data () &#123;</span><br><span class="line">    <span class="keyword">return</span> &#123;</span><br><span class="line">      msg: <span class="string">&#x27;&#x27;</span>,</span><br><span class="line">      msgList: []</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;,</span><br><span class="line">  mounted () &#123;</span><br><span class="line">    <span class="comment">//   绑定webSocket事件</span></span><br><span class="line">      <span class="comment">//连接成功的回调</span></span><br><span class="line">    ws.addEventListener(<span class="string">&#x27;open&#x27;</span>, <span class="built_in">this</span>.handleWsOpen.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">      <span class="comment">//关闭的回调</span></span><br><span class="line">    ws.addEventListener(<span class="string">&#x27;close&#x27;</span>, <span class="built_in">this</span>.handleWsClose.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">      <span class="comment">//连接错误的回调</span></span><br><span class="line">    ws.addEventListener(<span class="string">&#x27;error&#x27;</span>, <span class="built_in">this</span>.handleWsError.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">      <span class="comment">//接收发送消息的回调</span></span><br><span class="line">    ws.addEventListener(<span class="string">&#x27;message&#x27;</span>, <span class="built_in">this</span>.handleWsMessage.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">  &#125;,</span><br><span class="line">  methods: &#123;</span><br><span class="line">    sendMessage () &#123;</span><br><span class="line">      <span class="keyword">const</span> currentY = <span class="keyword">new</span> <span class="built_in">Date</span>().getFullYear()</span><br><span class="line">      <span class="keyword">let</span> currentM = <span class="keyword">new</span> <span class="built_in">Date</span>().getMonth() + <span class="number">1</span></span><br><span class="line">      <span class="keyword">let</span> currentD = <span class="keyword">new</span> <span class="built_in">Date</span>().getDate()</span><br><span class="line">      <span class="keyword">let</span> currentH = <span class="keyword">new</span> <span class="built_in">Date</span>().getHours()</span><br><span class="line">      <span class="keyword">let</span> currentMin = <span class="keyword">new</span> <span class="built_in">Date</span>().getMinutes()</span><br><span class="line">      <span class="keyword">let</span> currentS = <span class="keyword">new</span> <span class="built_in">Date</span>().getSeconds()</span><br><span class="line">      <span class="keyword">if</span> (currentM &lt; <span class="number">10</span>) &#123;</span><br><span class="line">        currentM = <span class="string">`0<span class="subst">$&#123;currentM&#125;</span>`</span></span><br><span class="line">      &#125;</span><br><span class="line">      <span class="keyword">if</span> (currentD &lt; <span class="number">10</span>) &#123;</span><br><span class="line">        currentD = <span class="string">`0<span class="subst">$&#123;currentD&#125;</span>`</span></span><br><span class="line">      &#125;</span><br><span class="line">      <span class="keyword">if</span> (currentH &lt; <span class="number">10</span>) &#123;</span><br><span class="line">        currentH = <span class="string">`0<span class="subst">$&#123;currentH&#125;</span>`</span></span><br><span class="line">      &#125;</span><br><span class="line">      <span class="keyword">if</span> (currentMin &lt; <span class="number">10</span>) &#123;</span><br><span class="line">        currentMin = <span class="string">`0<span class="subst">$&#123;currentMin&#125;</span>`</span></span><br><span class="line">      &#125;</span><br><span class="line">      <span class="keyword">if</span> (currentS &lt; <span class="number">10</span>) &#123;</span><br><span class="line">        currentS = <span class="string">`0<span class="subst">$&#123;currentS&#125;</span>`</span></span><br><span class="line">      &#125;</span><br><span class="line">      <span class="keyword">const</span> date = <span class="string">`<span class="subst">$&#123;currentY&#125;</span>-<span class="subst">$&#123;currentM&#125;</span>-<span class="subst">$&#123;currentD&#125;</span> <span class="subst">$&#123;currentH&#125;</span>:<span class="subst">$&#123;currentMin&#125;</span>:<span class="subst">$&#123;currentS&#125;</span>`</span></span><br><span class="line">      <span class="keyword">const</span> name = <span class="built_in">window</span>.sessionStorage.getItem(<span class="string">&#x27;nickname&#x27;</span>)</span><br><span class="line">      <span class="keyword">const</span> msg = <span class="built_in">JSON</span>.stringify(&#123;</span><br><span class="line">        msg: <span class="built_in">this</span>.msg,</span><br><span class="line">        name: name,</span><br><span class="line">        date: date,</span><br><span class="line">        left: <span class="literal">true</span></span><br><span class="line">      &#125;)</span><br><span class="line">      ws.send(msg)</span><br><span class="line">      <span class="comment">// 发送完清空聊天框</span></span><br><span class="line">      <span class="built_in">this</span>.msg = <span class="string">&#x27;&#x27;</span></span><br><span class="line">    &#125;,</span><br><span class="line">    handleWsOpen () &#123;</span><br><span class="line">      <span class="built_in">console</span>.log(<span class="string">&#x27;聊天已经启动！&#x27;</span>)</span><br><span class="line">    &#125;,</span><br><span class="line">    handleWsClose () &#123;</span><br><span class="line">      <span class="built_in">console</span>.log(<span class="string">&#x27;聊天已经关闭！&#x27;</span>)</span><br><span class="line">    &#125;,</span><br><span class="line">    handleWsError () &#123;</span><br><span class="line">      <span class="built_in">console</span>.log(<span class="string">&#x27;聊天出错！&#x27;</span>)</span><br><span class="line">    &#125;,</span><br><span class="line">    <span class="comment">// 收发消息</span></span><br><span class="line">    handleWsMessage (e) &#123;</span><br><span class="line">      <span class="built_in">console</span>.log(e)</span><br><span class="line">      <span class="keyword">const</span> msg = <span class="built_in">JSON</span>.parse(e.data)</span><br><span class="line">      <span class="built_in">this</span>.msgList.push(msg)</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line">&lt;/script&gt;</span><br></pre></td></tr></table></figure>


<p>2、react中</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">const</span> ws = <span class="keyword">new</span> WebSocket(<span class="string">&#x27;ws://localhost:3002&#x27;</span>)</span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">Chat</span> <span class="keyword">extends</span> <span class="title">Component</span> </span>&#123;</span><br><span class="line">    <span class="function"><span class="title">constructor</span>(<span class="params">props</span>)</span> &#123;</span><br><span class="line">        <span class="built_in">super</span>(props)</span><br><span class="line">        <span class="built_in">this</span>.state = &#123;</span><br><span class="line">            msg: <span class="string">&quot;&quot;</span>,</span><br><span class="line">            msgList:[]</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    componentDidMount () &#123;</span><br><span class="line">        ws.addEventListener(<span class="string">&#x27;open&#x27;</span>, <span class="built_in">this</span>.handleWsOpen.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">        ws.addEventListener(<span class="string">&#x27;close&#x27;</span>, <span class="built_in">this</span>.handleWsClose.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">        ws.addEventListener(<span class="string">&#x27;error&#x27;</span>, <span class="built_in">this</span>.handleWsError.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">        ws.addEventListener(<span class="string">&#x27;message&#x27;</span>, <span class="built_in">this</span>.handleWsMessage.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    sendMessage  = <span class="function">()=&gt;</span> &#123;</span><br><span class="line"></span><br><span class="line">        <span class="keyword">const</span> currentY = <span class="keyword">new</span> <span class="built_in">Date</span>().getFullYear()</span><br><span class="line">        <span class="keyword">let</span> currentM = <span class="keyword">new</span> <span class="built_in">Date</span>().getMonth() + <span class="number">1</span></span><br><span class="line">        <span class="keyword">let</span> currentD = <span class="keyword">new</span> <span class="built_in">Date</span>().getDate()</span><br><span class="line">        <span class="keyword">let</span> currentH = <span class="keyword">new</span> <span class="built_in">Date</span>().getHours()</span><br><span class="line">        <span class="keyword">let</span> currentMin = <span class="keyword">new</span> <span class="built_in">Date</span>().getMinutes()</span><br><span class="line">        <span class="keyword">let</span> currentS = <span class="keyword">new</span> <span class="built_in">Date</span>().getSeconds()</span><br><span class="line">        <span class="keyword">if</span> (currentM &lt; <span class="number">10</span>) &#123;</span><br><span class="line">          currentM = <span class="string">`0<span class="subst">$&#123;currentM&#125;</span>`</span></span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">if</span> (currentD &lt; <span class="number">10</span>) &#123;</span><br><span class="line">          currentD = <span class="string">`0<span class="subst">$&#123;currentD&#125;</span>`</span></span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">if</span> (currentH &lt; <span class="number">10</span>) &#123;</span><br><span class="line">          currentH = <span class="string">`0<span class="subst">$&#123;currentH&#125;</span>`</span></span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">if</span> (currentMin &lt; <span class="number">10</span>) &#123;</span><br><span class="line">          currentMin = <span class="string">`0<span class="subst">$&#123;currentMin&#125;</span>`</span></span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">if</span> (currentS &lt; <span class="number">10</span>) &#123;</span><br><span class="line">          currentS = <span class="string">`0<span class="subst">$&#123;currentS&#125;</span>`</span></span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">const</span> date = <span class="string">`<span class="subst">$&#123;currentY&#125;</span>-<span class="subst">$&#123;currentM&#125;</span>-<span class="subst">$&#123;currentD&#125;</span> <span class="subst">$&#123;currentH&#125;</span>:<span class="subst">$&#123;currentMin&#125;</span>:<span class="subst">$&#123;currentS&#125;</span>`</span></span><br><span class="line">        <span class="keyword">const</span> name = <span class="string">&quot;客服&quot;</span></span><br><span class="line">        <span class="keyword">const</span> msg = <span class="built_in">JSON</span>.stringify(&#123;</span><br><span class="line">          msg: <span class="built_in">this</span>.state.msg,</span><br><span class="line">          name: name,</span><br><span class="line">            date: date,</span><br><span class="line">            left: <span class="literal">false</span></span><br><span class="line">        &#125;)</span><br><span class="line">        ws.send(msg)</span><br><span class="line"></span><br><span class="line">        <span class="comment">// 发送完清空聊天框</span></span><br><span class="line">        <span class="built_in">this</span>.setState(&#123;</span><br><span class="line">                msg:<span class="string">&quot;&quot;</span></span><br><span class="line">            &#125;)</span><br><span class="line">      &#125;</span><br><span class="line">      handleWsOpen () &#123;</span><br><span class="line">        message.success(<span class="string">&quot;连接成功&quot;</span>)</span><br><span class="line">      &#125;</span><br><span class="line">      handleWsClose () &#123;</span><br><span class="line">          message.info(<span class="string">&quot;聊天结束&quot;</span>)</span><br><span class="line">      &#125;</span><br><span class="line">      handleWsError () &#123;</span><br><span class="line">       message.error(<span class="string">&quot;连接失败&quot;</span>)</span><br><span class="line">      &#125;</span><br><span class="line">      <span class="comment">// 收发消息</span></span><br><span class="line">    handleWsMessage (e) &#123;</span><br><span class="line">        <span class="keyword">const</span> msg = <span class="built_in">JSON</span>.parse(e.data)</span><br><span class="line">        <span class="keyword">let</span> arr = <span class="built_in">this</span>.state.msgList</span><br><span class="line">        arr.push(msg)</span><br><span class="line">          <span class="built_in">this</span>.setState(&#123;</span><br><span class="line">           msgList:arr</span><br><span class="line">       &#125;)</span><br><span class="line">      &#125;</span><br><span class="line">  </span><br><span class="line"></span><br><span class="line">  </span><br><span class="line">    render () &#123;</span><br><span class="line">        <span class="keyword">const</span> msgList = <span class="built_in">this</span>.state.msgList</span><br><span class="line">        <span class="keyword">return</span> (</span><br><span class="line">            &lt;Content</span><br><span class="line">                className=<span class="string">&quot;site-layout-background&quot;</span></span><br><span class="line">            &gt;</span><br><span class="line">                &lt;div className=<span class="string">&quot;chatBox&quot;</span>&gt;</span><br><span class="line">                    &lt;div className=<span class="string">&quot;chat&quot;</span>&gt;</span><br><span class="line">                        &#123;<span class="comment">/* 展示消息 */</span>&#125;</span><br><span class="line">                        &lt;div className=<span class="string">&quot;chat-info&quot;</span>&gt;</span><br><span class="line">                            &#123;msgList.map(<span class="function">(<span class="params">item, k</span>) =&gt;</span> &#123;</span><br><span class="line">                            <span class="keyword">return</span>   <span class="xml"><span class="tag">&lt;<span class="name">div</span> <span class="attr">className</span>=<span class="string">&quot;info-detail&quot;</span>&gt;</span></span></span><br><span class="line">                                &lt;div className=&#123;item.left?&#x27;head-a&#x27;:&#x27;head&#x27;&#125;&gt;</span><br><span class="line">                                &lt;span className=&#123;item.left?&#x27;name-a&#x27;:&#x27;name&#x27;&#125;&gt;&#123;item.name&#125;&lt;/span&gt;</span><br><span class="line">                                &lt;span&gt;&#123;item.date&#125;&lt;/span&gt;</span><br><span class="line"><span class="xml">                                <span class="tag">&lt;/<span class="name">div</span>&gt;</span></span></span><br><span class="line">                                &lt;div className=&#123;item.left?&#x27;info-main-a&#x27;:&#x27;info-main&#x27;&#125;&gt;</span><br><span class="line">                                  &lt;span&gt;&#123;item.msg&#125;&lt;/span&gt;</span><br><span class="line"><span class="xml">                                <span class="tag">&lt;/<span class="name">div</span>&gt;</span></span></span><br><span class="line"><span class="xml">                              <span class="tag">&lt;/<span class="name">div</span>&gt;</span></span></span><br><span class="line">                            &#125;)</span><br><span class="line">                                </span><br><span class="line">                       &#125;</span><br><span class="line">                        &lt;/div&gt;</span><br><span class="line">                        &#123;<span class="comment">/* 发送消息 */</span>&#125;</span><br><span class="line">                        &lt;div className=<span class="string">&quot;send-msg&quot;</span>&gt;</span><br><span class="line">                            &lt;Input value=&#123;<span class="built_in">this</span>.state.msg&#125; onChange=&#123;<span class="function">(<span class="params">e</span>) =&gt;</span> &#123; </span><br><span class="line">                                <span class="built_in">this</span>.setState(&#123;</span><br><span class="line">                                    msg:e.target.value</span><br><span class="line">                                &#125;)</span><br><span class="line">                            &#125;&#125; placeholder=<span class="string">&quot;请输入...&quot;</span></span><br><span class="line">                                style=&#123;&#123; <span class="attr">width</span>: <span class="string">&quot;350px&quot;</span>, <span class="attr">marginRight</span>: <span class="string">&quot;10px&quot;</span> &#125;&#125;</span><br><span class="line">                                onPressEnter=&#123;<span class="function">() =&gt;</span> &#123;</span><br><span class="line">                                    <span class="built_in">this</span>.sendMessage()</span><br><span class="line">                                &#125;&#125;</span><br><span class="line">                            &gt;</span><br><span class="line">                            &lt;/Input&gt;</span><br><span class="line">                            &lt;Button type=<span class="string">&quot;primary&quot;</span> onClick=&#123;<span class="function">() =&gt;</span> &#123;</span><br><span class="line">                                <span class="built_in">this</span>.sendMessage()</span><br><span class="line">                            &#125;&#125;&gt;</span><br><span class="line">                                发送</span><br><span class="line">                            &lt;/Button&gt;</span><br><span class="line">                        &lt;/div&gt;</span><br><span class="line">                    &lt;/div&gt;</span><br><span class="line">                &lt;/div&gt;</span><br><span class="line">            &lt;/Content &gt;</span><br><span class="line">        )</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>效果如下：</p>
<p><img src="https://img-blog.csdnimg.cn/20210411103231936.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTg5MjA4Ng==,size_16,color_FFFFFF,t_70" alt="在这里插入图片描述"><br><img src="https://img-blog.csdnimg.cn/20210411103231935.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTg5MjA4Ng==,size_16,color_FFFFFF,t_70" alt="在这里插入图片描述"></p>
<p>vue全部代码</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br><span class="line">127</span><br><span class="line">128</span><br><span class="line">129</span><br><span class="line">130</span><br><span class="line">131</span><br><span class="line">132</span><br><span class="line">133</span><br><span class="line">134</span><br><span class="line">135</span><br><span class="line">136</span><br><span class="line">137</span><br><span class="line">138</span><br><span class="line">139</span><br><span class="line">140</span><br><span class="line">141</span><br><span class="line">142</span><br><span class="line">143</span><br><span class="line">144</span><br><span class="line">145</span><br><span class="line">146</span><br><span class="line">147</span><br><span class="line">148</span><br><span class="line">149</span><br><span class="line">150</span><br><span class="line">151</span><br></pre></td><td class="code"><pre><span class="line">&lt;template&gt;</span><br><span class="line">    &lt;div <span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;chat&quot;</span>&gt;</span><br><span class="line">      &lt;div <span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;chat-box&quot;</span>&gt;</span><br><span class="line">        &lt;div <span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;chat-info&quot;</span>&gt;</span><br><span class="line">        &lt;div <span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;info-detail&quot;</span> v-<span class="keyword">for</span>=<span class="string">&quot;(item,k) in msgList&quot;</span> :key=<span class="string">&quot;k&quot;</span>&gt;</span><br><span class="line">          &lt;div :<span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;item.left?&#x27;head&#x27;:&#x27;head-a&#x27;&quot;</span>&gt;</span><br><span class="line">          &lt;span <span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;name&quot;</span>&gt;&#123;&#123;item.name&#125;&#125;&lt;/span&gt;</span><br><span class="line">          &lt;span&gt;&#123;&#123;item.date&#125;&#125;&lt;/span&gt;</span><br><span class="line">          &lt;/div&gt;</span><br><span class="line">          &lt;div :<span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;item.left?&#x27;info-main&#x27;:&#x27;info-main-a&#x27;&quot;</span>&gt;</span><br><span class="line">            &lt;span&gt;&#123;&#123;item.msg&#125;&#125;&lt;/span&gt;</span><br><span class="line">          &lt;/div&gt;</span><br><span class="line">        &lt;/div&gt;</span><br><span class="line">        &lt;/div&gt;</span><br><span class="line">        &lt;div <span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;chat-message&quot;</span>&gt;</span><br><span class="line">          &lt;el-input v-model=<span class="string">&quot;msg&quot;</span> placeholder=<span class="string">&quot;请输入内容&quot;</span> @keyup.enter.native=<span class="string">&quot;sendMessage&quot;</span> &gt;</span><br><span class="line">          &lt;el-button slot=<span class="string">&quot;append&quot;</span> type=<span class="string">&quot;primary&quot;</span> @click=<span class="string">&quot;sendMessage&quot;</span> &gt;发送&lt;/el-button&gt;</span><br><span class="line">      &lt;/el-input&gt;</span><br><span class="line">      &lt;/div&gt;</span><br><span class="line">      &lt;/div&gt;</span><br><span class="line"></span><br><span class="line">    &lt;/div&gt;</span><br><span class="line">&lt;/template&gt;</span><br><span class="line"></span><br><span class="line">&lt;script&gt;</span><br><span class="line"><span class="keyword">const</span> ws = <span class="keyword">new</span> WebSocket(<span class="string">&#x27;ws://localhost:3002&#x27;</span>)</span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> &#123;</span><br><span class="line">  data () &#123;</span><br><span class="line">    <span class="keyword">return</span> &#123;</span><br><span class="line">      msg: <span class="string">&#x27;&#x27;</span>,</span><br><span class="line">      msgList: []</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;,</span><br><span class="line">  mounted () &#123;</span><br><span class="line">    <span class="comment">//   绑定webSocket事件</span></span><br><span class="line">    ws.addEventListener(<span class="string">&#x27;open&#x27;</span>, <span class="built_in">this</span>.handleWsOpen.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">    ws.addEventListener(<span class="string">&#x27;close&#x27;</span>, <span class="built_in">this</span>.handleWsClose.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">    ws.addEventListener(<span class="string">&#x27;error&#x27;</span>, <span class="built_in">this</span>.handleWsError.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">    ws.addEventListener(<span class="string">&#x27;message&#x27;</span>, <span class="built_in">this</span>.handleWsMessage.bind(<span class="built_in">this</span>), <span class="literal">false</span>)</span><br><span class="line">  &#125;,</span><br><span class="line">  methods: &#123;</span><br><span class="line">    sendMessage () &#123;</span><br><span class="line">      <span class="keyword">const</span> currentY = <span class="keyword">new</span> <span class="built_in">Date</span>().getFullYear()</span><br><span class="line">      <span class="keyword">let</span> currentM = <span class="keyword">new</span> <span class="built_in">Date</span>().getMonth() + <span class="number">1</span></span><br><span class="line">      <span class="keyword">let</span> currentD = <span class="keyword">new</span> <span class="built_in">Date</span>().getDate()</span><br><span class="line">      <span class="keyword">let</span> currentH = <span class="keyword">new</span> <span class="built_in">Date</span>().getHours()</span><br><span class="line">      <span class="keyword">let</span> currentMin = <span class="keyword">new</span> <span class="built_in">Date</span>().getMinutes()</span><br><span class="line">      <span class="keyword">let</span> currentS = <span class="keyword">new</span> <span class="built_in">Date</span>().getSeconds()</span><br><span class="line">      <span class="keyword">if</span> (currentM &lt; <span class="number">10</span>) &#123;</span><br><span class="line">        currentM = <span class="string">`0<span class="subst">$&#123;currentM&#125;</span>`</span></span><br><span class="line">      &#125;</span><br><span class="line">      <span class="keyword">if</span> (currentD &lt; <span class="number">10</span>) &#123;</span><br><span class="line">        currentD = <span class="string">`0<span class="subst">$&#123;currentD&#125;</span>`</span></span><br><span class="line">      &#125;</span><br><span class="line">      <span class="keyword">if</span> (currentH &lt; <span class="number">10</span>) &#123;</span><br><span class="line">        currentH = <span class="string">`0<span class="subst">$&#123;currentH&#125;</span>`</span></span><br><span class="line">      &#125;</span><br><span class="line">      <span class="keyword">if</span> (currentMin &lt; <span class="number">10</span>) &#123;</span><br><span class="line">        currentMin = <span class="string">`0<span class="subst">$&#123;currentMin&#125;</span>`</span></span><br><span class="line">      &#125;</span><br><span class="line">      <span class="keyword">if</span> (currentS &lt; <span class="number">10</span>) &#123;</span><br><span class="line">        currentS = <span class="string">`0<span class="subst">$&#123;currentS&#125;</span>`</span></span><br><span class="line">      &#125;</span><br><span class="line">      <span class="keyword">const</span> date = <span class="string">`<span class="subst">$&#123;currentY&#125;</span>-<span class="subst">$&#123;currentM&#125;</span>-<span class="subst">$&#123;currentD&#125;</span> <span class="subst">$&#123;currentH&#125;</span>:<span class="subst">$&#123;currentMin&#125;</span>:<span class="subst">$&#123;currentS&#125;</span>`</span></span><br><span class="line">      <span class="keyword">const</span> name = <span class="built_in">window</span>.sessionStorage.getItem(<span class="string">&#x27;nickname&#x27;</span>)</span><br><span class="line">      <span class="keyword">const</span> msg = <span class="built_in">JSON</span>.stringify(&#123;</span><br><span class="line">        msg: <span class="built_in">this</span>.msg,</span><br><span class="line">        name: name,</span><br><span class="line">        date: date,</span><br><span class="line">        left: <span class="literal">true</span></span><br><span class="line">      &#125;)</span><br><span class="line">      ws.send(msg)</span><br><span class="line">      <span class="comment">// 发送完清空聊天框</span></span><br><span class="line">      <span class="built_in">this</span>.msg = <span class="string">&#x27;&#x27;</span></span><br><span class="line">    &#125;,</span><br><span class="line">    handleWsOpen () &#123;</span><br><span class="line">      <span class="built_in">console</span>.log(<span class="string">&#x27;聊天已经启动！&#x27;</span>)</span><br><span class="line">    &#125;,</span><br><span class="line">    handleWsClose () &#123;</span><br><span class="line">      <span class="built_in">console</span>.log(<span class="string">&#x27;聊天已经关闭！&#x27;</span>)</span><br><span class="line">    &#125;,</span><br><span class="line">    handleWsError () &#123;</span><br><span class="line">      <span class="built_in">console</span>.log(<span class="string">&#x27;聊天出错！&#x27;</span>)</span><br><span class="line">    &#125;,</span><br><span class="line">    <span class="comment">// 收发消息</span></span><br><span class="line">    handleWsMessage (e) &#123;</span><br><span class="line">      <span class="built_in">console</span>.log(e)</span><br><span class="line">      <span class="keyword">const</span> msg = <span class="built_in">JSON</span>.parse(e.data)</span><br><span class="line">      <span class="built_in">this</span>.msgList.push(msg)</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line">&lt;/script&gt;</span><br><span class="line"></span><br><span class="line">&lt;style lang=<span class="string">&quot;less&quot;</span> scoped&gt;</span><br><span class="line">.chat 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      });
      clipboard.on('error', function(e) {
        e.clearSelection();
        let $btn = $(e.trigger);
        $btn.addClass('copy-failed');
        let $icon = $($btn.find('i'));
        $icon.removeClass('ri-file-copy-2-line');
        $icon.addClass('ri-time-line');
        let $span = $($btn.find('span'));
        $span[0].innerText = 'COPY FAILED';
        
        wait(function () { // 等待两秒钟后恢复
          $icon.removeClass('ri-time-line');
          $icon.addClass('ri-file-copy-2-line');
          $span[0].innerText = 'COPY';
        }, 2000);
      });
    }
    initCopyCode();
  }(window, document);
</script>


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